The Ultra Filter Membrane is made of the fabric.The aperture of the fabric is less than 0. micron so it can remove the dissolved solids,organics and bacteria etc.This 5 stage filtration with UF membrane is easy to install and operate.The Ultra Filter MembraneDescription: 5 stage Ultra Filtration system with faucetFunction of stage cartridgeStagefilterMain Function1PP Sediment Filter To remove sand,silt,colloid and any other suspension its diameter more than 5um in water.2 Granular Carbon FilterTo adsorb odor,chlorine and its outgrowth in raw water.3 Block Carbon Filter To adsorb odor,chlorine and its outgrowth in raw water.4 Ultra-Filtration membraneTo remove pathogens and bacteria from water by using physical barrier filtration5 Post inline Carbon FilterTo adsorb odor and adjust the test of purified waterDescription: 5 stage Ultra Filter system